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Hydro Electric Fish Passage Facilities
Columbia, South Carolina
For more than 100 years, migratory fish were unable to swim beyond a diversion dam on the Broad River. South Carolina Electric & Gas contracted Thalle to build a vertical slot fish ladder to allow American Shad and other migratory fish to swim upstream of the dam and return to the ocean. The fish ladder is a concrete structure with a series of pools similar to a staircase that allow fish to bypass the diversion dam. The project required cofferdam construction to protect the worksite and extensive concrete construction.
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Beaman Lake Embankment Rehabilitation
Raleigh, North Carolina
Thalle was contracted by the City of Raleigh to rehabilitate Beaman Lake. The project called for clearing, grading, storm drainage, cast-in-place reinforced concrete structures, excavation of the lake bottom, construction of a dam spillway, utility relocation and replacement, curb and gutter installation, paving and sheet pile installation. The project also required Thalle to restore a healthy ecological system to the lake. This environmentally sensitive project was an Edge award recipient.
Kensico Watershed Storm Water Management
Westchester County, New York
The New York City Department of Environmental Protection, in order to comply with federal regulations developed a plan to manage and safeguard the Kensico Reservoir and its watershed. Protecting this watershed was necessary as it is the final impoundment for most of the city’s water supply before it reaches the distribution system. Thalle’s contract called for construction of storm water detention facilities which included construction of concrete structures, impermeable earthen dams and storm drain systems. The work took place in an environmentally sensitive area requiring intricate sediment and erosion control measures.
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